2263521 has 16 divisors (see below), whose sum is σ = 3282944. Its totient is φ = 1378944.

The previous prime is 2263519. The next prime is 2263531. The reversal of 2263521 is 1253622.

It is not a de Polignac number, because 2263521 - 2¹ = 2263519 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2³ + 2¹⁴ + 6² + 3¹³ + 5⁸ + 2¹⁸ + 1 .

It is the 1505-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2263531) by changing a digit.

It is a nontrivial repunit in base 1504.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4725 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (205184).

2^2263521 is an apocalyptic number.

It is an amenable number.

2263521 is a deficient number, since it is larger than the sum of its proper divisors (1019423).

2263521 is a wasteful number, since it uses less digits than its factorization.

2263521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its digits is 720, while the sum is 21.

The square root of 2263521 is about 1504.5002492522. The cubic root of 2263521 is about 131.2990274888.

The spelling of 2263521 in words is "two million, two hundred sixty-three thousand, five hundred twenty-one".